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Finding the Fourth Proportional to 78,485.95, 117,728.92 and 23,081.95

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Solution

The fourth proportional to 78,485.95, 117,728.92 and 23,081.95 is: 34,622.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,485.95 : 117,728.92 = 23,081.95 : x
  2. Step 2: Convert to fraction form
    78,485.95/117,728.92 = 23,081.95/x
  3. Step 3: Cross multiply
    78,485.95x = 117,728.92 × 23,081.95
  4. Step 4: Simplify right side
    78,485.95x = 2,717,412,456.35
  5. Step 5: Solve for x
    x = 2,717,412,456.35/78,485.95
  6. Step 6: Final answer
    x = 34,622.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.